Privacy
Short version: no accounts, no tracking cookies, and your word lists never leave your device.
What stays in your browser
Definio uses your browser’s local storage for your saved words, your quiz boxes and your recent searches. This data is never sent to us. It stays until you clear it:
Dictionary and synonym lookups
When you search, your browser asks the Free Dictionary API (dictionaryapi.dev) and the Datamuse API (datamuse.com) directly for the word you typed. Those services see the word and your IP address, under their own policies.
AI features
The sentence checker, example generator, in-context synonyms and origin tracer send the word and any sentence you typed to an AI model through Vercel’s AI Gateway. We do not store these requests or link them to you. Don’t paste personal information into these boxes.
Analytics
We use Ahrefs Web Analytics to count page views. It is cookie-free and does not build a profile of you.
Contact
Questions about this page can be sent through the contact details on the domain’s registration record.